Cut a 7-inch-diameter a circle out of card stock. Draw a spiral on the circle as shown. Next, use the scissors to cut along the lines you drew starting on the outside and ending in the center. Use the hole punch or
scissors to make a hole at the middle of the spiral and attach the thread with a knot. Tie the other end of
the thread loosely around the center of the stick so you can suspend the spiral in the air. Fill the pot with 2
inches of water. Heat the water until it boils, and then turn off the heat source. Let the pot sit for 4
minutes. Holding the ends of the stick with the spiral attached, position the bottom of the spiral right
above the top of the pot so it's not touching the water. Describe what happens.

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.